SignalScope X offers a range of powerful measurement and analysis tools to enhance your productivity in areas such as acoustics (sound and vibration), audio, electronics, and electroacoustics.

SignalScope X, which is free to download, includes a free oscilloscope tool. SignalScope X makes additional tools available via 3 tiers of subscription-based tool sets to meet your basic, advanced, and professional needs. Each subscription unlocks its tools and features in SignalScope X on your iPhone, iPad, and Mac.

- Analyze signals coming from the Mac or iOS device’s current audio input device.
- Assign engineering units to your input signals and calibrate external transducers for accurate measurements.
- Assign input channel units and sensitivities for individual USB Audio devices.
- Direct support for Digiducer digital accelerometers and 485B39 USB ICP signal conditioner from The Modal Shop.
- Direct support for miniDSP UMIK-1 measurement microphone and EARS headphone/IEM measurement system.
- Nominal acoustic sensitivities included for iPhone and iPad built-in microphones, voltage sensitivities for headset input (including the Lightning-to-headset adapter included with recent iPhone models)
- Manually switch between available audio input and output sources.
- Load microphone frequency response data (FRD) and apply frequency response correction (FRC) to FFT-based measurements.
- Manually adjust audio sample rates, even up to 192 kHz, depending on input hardware.
- Assign engineering units to your input signals and calibrate external transducers for accurate measurements.
- Save acquired measurement data to CSV, TXT (tab-delimited), or MAT files.
- Save high-resolution analyzer display images to PDF files.
- Retrieve your data files from your device via Files (iCloud Drive), iTunes File Sharing, or through a web browser on another device. Files may also be opened in other compatible apps (e.g. Mail, Notes, Numbers, Dropbox, etc).

Basic Tools:
- Oscilloscope - Basic oscilloscope and triggering functions
- FFT Analyzer - Spectrum analyzer with user-settable frequency limits and basic triggering
- 2D Real-time Spectrogram Analyzer
- XY Plotter - Create Lissajous curves or visualize your stereo mix

Advanced Tools: (Advanced Tool Set also includes basic tools)
- 3D Real-time Spectrogram Analyzer - Stunning live visualization of incoming data
- Octave-band Analyzer - Whole and 1/3-octave RTA
- Level Meter - Overall signal level meter
- Noise Dosimeter
- Data Recorder - Stream up to 8 channels to WAV, AIF, or CAF audio files
- Stereo Signal Generator

Pro Tools: (Pro Tool Set subscription includes basic and advanced tools)
- Dual-channel System Analyzer (Dual FFT analysis with support for Frequency Response Magnitude/Phase, Phase Delay, Group Delay, Coherence, Impulse Response and Cross-Correlation)
- Room Acoustics Analyzer (T20, T30, T60, nonlinearity, EDT, Early Decay Time, Center Time, Clarity, and Definition in various frequency bands, adjustable Schroeder integration limits)
- MultiTool - Powerful data monitoring and project management (Add up to 2 subtools on iPhone, 6 subtools on Mac or iPad Pro with 10.5-inch or larger display, 4 subtools on other iPad models, and save configurations for easy recall at a later time.)
- Multi-channel Audio File Player - Analyze pre-recorded data

Additional Pro Features:
- Data logging support in the Level Meter, Octave Analyzer, and Noise Dosimeter
- Percentile exceeded sound levels in the Level Meter and Octave Analyzer
- NC, RNC, and NR references curves, NC, SIL, and NR values in the Octave Analyzer
- Voltage decibel levels can be displayed in dBV or dBu

Subscription Terms:
Privacy Policy:
Terms and Conditions for

What’s New

Version 11.5.2

- A graphics flaw in version 11.5.1 that occurred after saving data has been corrected.
- A bug when saving a single-channel MAT data file in the Octave Analyzer has been fixed.
- A potential condition for the Octave Analyzer to hang the app has been removed.

Ratings and Reviews

2.7 out of 5
9 Ratings

9 Ratings

Al707 ,

You won’t be happy, the negative reviews are accurate

Like so many others I purchased the app, and expensive add-ons from this developer. I too paid well over $100 for the software. The app no longer works. I exchanged emails with them, and they have lots of talking points to explain why your expensive software no longer works, and you should buy it all over again for even more money, with no real added features. It comes down to this, the developer wants more money. Ok, sure, why not? Except they want the money from the people who already paid for it. The app is disabled, so you either pay them all over again, or you software is a brick that won’t even open. They want to blame Apple. Really? They want to move to a subscription model, and they are going to make you pay. If you haven’t already purchased this software, I would suggest you think whether you want to be treated the way we have been. There are alternatives available. Why suffer the pain of dealing with this developer who treats his customers so poorly? The problem isn’t the software, it’s that the developer has no regard for their customers, and, to put it simply, won’t do the right thing. BTW, just found the Spectrum app.

otherwillsmith ,

Great tools, lousy company

This company makes great tools. I have used their apps and they work great. Unfortunately, they do not have any customer loyalty at all. I paid $150 for a complete tool set and got great use out of it for several years. Unfortunately it was written for 32 bit architecture. When Apple forced app developers to update to 64 bit, these guys wrote a new app and started billing monthly. They didn’t bother to update the previous app and now my expensive app toolkit is useless. When I asked for support, they blamed Apple. When I asked about legacy upgrades, they claim Apple won’t let them. The tool kit that most closely resembles the kit I purchased is not over $170 per year. I only need this tool about three times a year. I need a one time fee tool. I’m headed back to SMAART.

Jf4828 ,

Better than expected

I’m a long time user of AudioTools and Smaart. So far this application looks good, is responsive and less buggy than others. I know it’s expensive and subscription based but the other tools are quite expensive as there is not a large user base. SPL calibration worked flawlessly. For live sound I love that I can simultaneously monitor RTA, spectroscope, dB at multiple weightings and sound exposure etc. I’ve also tuned with dual channel measurement and worked flawlessly(although I slightly prefer Smaart for this one thing…). Only thing I haven’t sorted is how to change scale of Y axis to custom ranges I’m interested in…. The fact that this works with single subscription on my phone, iPad and Mac really deals the deal for me.


Basic Tool Set, 1 Month
SignalScope X Basic Tools
Free Trial
Advanced Tool Set, 1 Month
SignalScope X Advanced Tools
Free Trial
Pro Tool Set, 1 Month
SignalScope X Professional Tools
Free Trial

App Privacy

The developer, Faber Acoustical, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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